WO2007098906A1 - Actionneur pour capot actif - Google Patents

Actionneur pour capot actif Download PDF

Info

Publication number
WO2007098906A1
WO2007098906A1 PCT/EP2007/001635 EP2007001635W WO2007098906A1 WO 2007098906 A1 WO2007098906 A1 WO 2007098906A1 EP 2007001635 W EP2007001635 W EP 2007001635W WO 2007098906 A1 WO2007098906 A1 WO 2007098906A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
actuator according
bore
hood
cylinder
Prior art date
Application number
PCT/EP2007/001635
Other languages
German (de)
English (en)
Inventor
Joachim SCHÄFER
Volker Scheuch
Werner Schmidt
Martin Zilg
Original Assignee
Gm Global Technology Operations, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gm Global Technology Operations, Inc. filed Critical Gm Global Technology Operations, Inc.
Priority to EP07711661A priority Critical patent/EP1991449B1/fr
Priority to CN2007800068820A priority patent/CN101389511B/zh
Priority to AT07711661T priority patent/ATE466752T1/de
Priority to DE502007003656T priority patent/DE502007003656D1/de
Priority to US12/280,785 priority patent/US8196507B2/en
Publication of WO2007098906A1 publication Critical patent/WO2007098906A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/34—Protecting non-occupants of a vehicle, e.g. pedestrians
    • B60R21/38—Protecting non-occupants of a vehicle, e.g. pedestrians using means for lifting bonnets

Definitions

  • the present invention relates to a pneumatic actuator for an active hood of a motor vehicle.
  • An active hood is understood to mean a hood which is automatically raised in the event of an accident by one or more actuators in order to increase the distance between the hood and underlying, hard-to-deform parts of the motor vehicle and thus to a pedestrian possibly hitting the hood To provide extended deformation path. This is to prevent the pedestrian from bouncing at a speed on the non-deformable body parts, which can lead to life-threatening injuries.
  • DE 197 12 961 A1 and DE 103 31 '018 A1 describe mechanical actuators driven by springs.
  • a compression spring acts, on the one hand, on the bodywork of a vehicle and, on the other hand, on an elongate hinge support An end is anchored by a hinge and at one end by a releasable latch on the body and handlebars
  • BEST ⁇ HGUH Q BKOPIE Multi-joint hinge carries, which lead a movement for opening and closing the hood.
  • a disadvantage of these known mechanical actuators is that they require strong and correspondingly heavy springs to store the energy needed for a quick lifting of the hood.
  • a more favorable ratio of weight to available drive energy can be achieved by using pneumatically, in particular by pyrotechnic means, by igniting a propellant charge, driven actuators.
  • pyrotechnic actuators have the problem that the gas pressure driving them is available only at the moment of lifting the hood. Under normal operating conditions, the cylinder of such an actuator is depressurized, and any play of the piston relative to the cylinder in the unpressurized state is transmitted to the hood when it is held only by actuators of this type.
  • the energy required to destroy the predetermined breaking points must be available at the same time as the energy for lifting the hood, which requires a correspondingly powerful energy source.
  • the destruction of the predetermined breaking points involves irreversible damage to the entire structure, so that costly repairs are required after each release of the actuators, even if the hood was otherwise affected in any way in an accident that led to the actuators ,
  • Such an actuator according to the present invention comprises a cylinder and a guided on the cylinder between a rest position and an extended position movable and lockable in the rest position piston and a spring element which biases the piston in the rest position in the direction of the extended position.
  • the biasing force of the spring element is expediently at least as great as the forces acting on the hood under normal operating conditions during driving and when the hood is raised and lowered, so that the hood remains apparently rigid in the rest position under normal operating conditions.
  • a hood hinge is supported directly by the piston.
  • the hinge can be lifted together with the hood and does not need to be disassembled, as in many conventional arrangements, to allow the hood to be raised.
  • the spring element acts on the piston adjacent to its end adjacent to the hood hinge.
  • a spring element can be used easily and inexpensively a rubber-elastic body.
  • a rubber-elastic body may have a high spring constant, so that a small deformation of the body is sufficient to produce the required spring force.
  • the Deformation of the body will generally be less than one tenth of the piston stroke.
  • the spring element is clamped on the one hand between the cylinder and on the other hand a hinge carrier of the hood hinge fastened to the piston.
  • the hinge carrier may be attached to the piston in a simple manner by screwing in a rod of the piston.
  • An unlocking of the piston and its movement in the extended position are preferably driven by a same pressure source.
  • the cylinder preferably has an inlet pipe for a working gas extending in the direction of movement of the piston, and a locking projection of the piston is held in the inlet pipe by a cross bar.
  • the locking projection preferably fills the free cross section of the inlet line.
  • this preferably has an end face exposed to the working gas and can be displaced from the inlet line by pressure of the working gas on the end face.
  • the latter is preferably tapered towards its end face.
  • the crossbar passes through a bore of the locking projection, it is preferably provided with at least one of the inner surface of the bore-contacting rib. This shape reduces the possible contact surface between the crossbar and the inner surface of the bore and thus facilitates the displacement of the cross bar, which is especially in the case of a non-optimal surface quality of crossbar and bore, for example, due to corrosion of importance.
  • Ribs of this type can be realized in particular in that the bore has a round and the crossbar has a polygonal cross section.
  • the transverse bolt has a shoulder on an end remote from its end face, which covers the bore. This shoulder ensures that the pressure of working gas which penetrates between the cross bolt and the inner surface of the bore, is used to push back to the cross bar ⁇ .
  • FIG. 1 shows a motor vehicle with a hood held by actuators in a raised position.
  • FIG. 2 shows a perspective apart drawn view of an actuator according to the invention
  • FIG. 3 shows a schematic section through the actuator of FIG. 2;
  • Fig. 4 is a perspective view of a usable in the actuator cross bar.
  • Fig. 1 shows schematically a motor vehicle with a hood 1, held by adjacent to the front or rear edge of the hood 4, 2 arranged actuators 5, 3 in a relation to a normal position in which it is flush with adjacent body parts 6, raised position is.
  • the hood 1 is supported exclusively by the actuators 3, 5.
  • FIG. 2 shows a perspective exploded view of one of the two rear actuators 3. It comprises an elongate cylinder 7 which carries two mounting flanges for mounting the cylinder 7 on a rigid frame of the motor vehicle. At a lower end of the cylinder 7, a gas inlet flange 9 is arranged with inlet opening 10. A gas generator support 11 is provided to be gas-tightly secured to the inlet flange 9. The gas generator support 11 has chambers for three gas generators 12, which are connected to the inlet opening 10.
  • a destructible partition may be mounted in the gas generator support 11, which ruptures when the gas generator 12 is fired in its associated chamber, but which has a chamber associated therewith accommodated gas generator 12 protects against, by the Explosion of a gas generator 12 to be ignited in an adjacent chamber.
  • a lid 13 to be mounted on the side of the gas generator carrier 11 facing away from the cylinder 7 contains an electronic ignition circuit which ignites one of the gas generators 12 when a firing command is received via a signal cable 14.
  • the actuator of Fig. 2 is thus able to drive three erection movements of the hood 1, before it is consumed and must be replaced.
  • gas generator carrier 11 It is obvious that more or fewer than three gas generators 12 may be accommodated in the gas generator carrier 11. However, the number of gas generators will generally be no greater than five or six as the number of expected hood deployments is limited during the life of a motor vehicle.
  • a piston rod 18 emerging at an upper end face 16 of the cylinder 7 is threaded at its tip.
  • the thread is intended to be screwed into a hinge support ib9 on which a handlebar or, in the preferred case, a hinged hinge, a fixedly attached to the hood 1 hinge part 17 is hinged.
  • a buffer piece 20 of hard rubber or other slightly elastically deformable material with a central bore 21 is provided to be plugged onto the piston rod 18 and clamped in the rest position of the actuator between the hinge support 19 and the end face 16 of the cylinder and deformed. For this purpose, the piston rod 18 is locked in the rest state in the cylinder 7, as will be described in more detail below.
  • the deformation of the buffer piece 20 is strong enough to cause a restoring force of the buffer piece 20, which is greater than any force acting on the hood under normal operating conditions, when driving or when opening and closing the hood 1.
  • a restoring force of the buffer piece 20 which is greater than any force acting on the hood under normal operating conditions, when driving or when opening and closing the hood 1.
  • Fig. 3 shows the cylinder 7 of Fig. 2 in an axial section.
  • the piston rod 18 hangs together with a piston plate 22, which is in the rest position shown in the figure at the lower end of an internal chamber 23 of the cylinder.
  • a gas inlet conduit has an outer portion 24 which extends from the inlet opening 10 perpendicular to the longitudinal axis of the cylinder 7, and an axially oriented inner portion 25 which opens into the chamber 23 at the bottom thereof.
  • a locking projection 26 which is part of the piston 15.
  • An upper portion 27 of the locking projection 26 fills the inner portion 25 of the gas inlet line in its entire cross section.
  • the cross section of the projection 26 is reduced. Through this lower section 28 - S -
  • a cross bar 30 is slidably received in the bore 29. It has the shape of a cylinder which is slightly tapered towards its front side 31 facing the inlet opening 10. A circumferential flange on the opposite end face of the cylinder forms a shoulder 32, which is pressed by a spring 33 against a stop.
  • a blocking body 34 of stepped cross-section In a blind bore extending downwardly of the inner portion 25 of the gas inlet duct there is a blocking body 34 of stepped cross-section, which is held pressed by a spring 35 against the lower tip of the locking projection 26.
  • the propellant gas generated by this initially presses substantially against the end face 31 of the transverse bolt 30 and urges it back against the force of the spring 33. Since the upper portion 27 of the locking protrusion 26 initially blocks the gas inlet line, the pressure in the chamber 23 remains low, and the friction force required to displace the cross bar 30 is generated only by the buffer piece 20 urging the hinge carrier 19 upwardly.
  • the piston 15 can be easily pushed back into the cylinder 7.
  • the locking projection 26 engages again .in the gas inlet line and it finally forces the locking body 34 back, whereupon finally the crossbar 30 engages again in the bore 29.
  • the actuator is now ready to be triggered again.
  • FIG. 4 shows a modified embodiment of the transverse bar 30.
  • the cross bar 30 is intended to engage in a round bore 29 whose outline is indicated as a dot-dash line in FIG.
  • the cross bar itself, however, is not cylindrical, but has a diamond-like cross section with four ribs 37 at the corners of the rhombus, which are able to contact the inside of the bore 29 and which are separated from each other by recesses 38.
  • the achieved by this cross-sectional design reduction of the contact surface between the crossbar 30 and bore 29 prevents sticking of the cross bar 30 even if its surfaces or the bore 29 have been repeatedly subjected to the hot propellant gases from a gas generator 12 and thus may be slightly attacked.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Superstructure Of Vehicle (AREA)
  • Actuator (AREA)
  • Lock And Its Accessories (AREA)

Abstract

L'invention concerne un actionneur pneumatique (3, 5) pour un capot actif (1), qui présente un cylindre (7) et un piston (18, 22) qui peut être déplacé sur le cylindre (7) entre une position de repos et une position déployée et qui peut être verrouillé dans la position de repos. Dans sa position de repos, le piston (18, 22) est précontraint par un élément élastique (20) en direction de sa position déployée.
PCT/EP2007/001635 2006-02-27 2007-02-26 Actionneur pour capot actif WO2007098906A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP07711661A EP1991449B1 (fr) 2006-02-27 2007-02-26 Actionneur pour capot actif
CN2007800068820A CN101389511B (zh) 2006-02-27 2007-02-26 用于主动式发动机罩的促动器
AT07711661T ATE466752T1 (de) 2006-02-27 2007-02-26 Aktuator fur eine aktive haube
DE502007003656T DE502007003656D1 (de) 2006-02-27 2007-02-26 Aktuator fur eine aktive haube
US12/280,785 US8196507B2 (en) 2006-02-27 2007-02-26 Actuator for active motor vehicle bonnet

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006008901A DE102006008901A1 (de) 2006-02-27 2006-02-27 Aktuator für eine aktive Haube
DE102006008901.4 2006-02-27

Publications (1)

Publication Number Publication Date
WO2007098906A1 true WO2007098906A1 (fr) 2007-09-07

Family

ID=38016530

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2007/001635 WO2007098906A1 (fr) 2006-02-27 2007-02-26 Actionneur pour capot actif

Country Status (7)

Country Link
US (1) US8196507B2 (fr)
EP (1) EP1991449B1 (fr)
CN (1) CN101389511B (fr)
AT (1) ATE466752T1 (fr)
DE (2) DE102006008901A1 (fr)
RU (1) RU2414364C2 (fr)
WO (1) WO2007098906A1 (fr)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006040203A1 (de) * 2006-08-28 2008-03-06 GM Global Technology Operations, Inc., Detroit Aktuator für eine aktive Haube
DE102008011731A1 (de) * 2008-02-28 2009-09-03 GM Global Technology Operations, Inc., Detroit Pneumatischer Aktuator
DE102010023283A1 (de) 2010-06-10 2011-12-15 Gm Global Technology Operations Llc (N.D.Ges.D. Staates Delaware) Kraftfahrzeugkarosserie mit reversierbarer Haube
DE102010026219A1 (de) 2010-07-06 2012-01-12 Gm Global Technology Operations Llc (N.D.Ges.D. Staates Delaware) Kraftfahrzeugkarosserie mit anhebbarer Haube
US8579068B2 (en) * 2011-06-02 2013-11-12 Ford Global Technologies, Llc Hood latch and striker system for pedestrian protection
JP5832024B2 (ja) * 2012-01-26 2015-12-16 富士重工業株式会社 車両用歩行者保護装置
DE202012012378U1 (de) * 2012-12-21 2013-01-18 Key Safety Systems Inc. Antriebsvorrichtung zum Anheben einer für Fußgängerschutz ausgebildeten Motorhaube eines Fahrzeugs
CN104192091B (zh) * 2014-09-16 2016-10-26 江苏天诚车饰科技有限公司 一种发动机罩抬升装置
DE102014224259B4 (de) * 2014-11-27 2024-07-25 Van Halteren Technologies Boxtel B.V. Linearaktuator
CN106627472B (zh) * 2015-07-29 2019-02-26 比亚迪股份有限公司 发动机罩铰链结构及行人保护装置
JP6764242B2 (ja) * 2016-03-31 2020-09-30 株式会社Ｓｕｂａｒｕ 車両のサイクリスト保護装置
US9834164B1 (en) 2016-07-27 2017-12-05 GM Global Technology Operations LLC Impact sensor arrangements for active hood systems of motor vehicles
US9840140B1 (en) 2016-08-05 2017-12-12 GM Global Technology Operations LLC Compound-power-split electrically variable transmissions with motor clutching devices
US11007972B2 (en) 2017-09-22 2021-05-18 GM Global Technology Operations LLC Multi-pull latch and lock systems for compartment closure assemblies of motor vehicles
US10704304B2 (en) 2017-10-26 2020-07-07 GM Global Technology Operations LLC Memory levers for latch mechanisms of vehicle compartment closure assemblies
US11118381B2 (en) 2018-03-07 2021-09-14 GM Global Technology Operations LLC Dual-pull latch assemblies for compartment closure assemblies of motor vehicles
FR3085916B1 (fr) * 2018-09-14 2021-04-09 Autoliv Dev Dispositif de securite de vehicule pour apporter une protection pieton
CN113137152A (zh) * 2021-05-12 2021-07-20 厦门理工学院 一种发动机罩铰链和车辆

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20013256U1 (de) * 2000-08-01 2001-12-13 TR ENGINEERING GmbH, 67433 Neustadt Betätigungsvorrichtung für ein bewegliches Element
DE10247801A1 (de) * 2002-10-14 2004-04-22 Innotec Forschungs- Und Entwicklungs-Gmbh Fussgängerschutz-Aktuator
WO2004108486A1 (fr) * 2003-06-06 2004-12-16 Acts - Advanced Car Technology Systems Gmbh & Co. Kg Dispositif et procede pour soulever le capot frontal d'une automobile en cas de collision avec un pieton
EP1745993A1 (fr) * 2005-07-23 2007-01-24 ISE Innomotive Systems Europe GmbH Dispositif de levage pour capot moteur d'un véhicule automobile

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19712961B4 (de) * 1997-03-27 2009-07-09 Bayerische Motoren Werke Aktiengesellschaft Verfahren betreffend eine Einrichtung zum Anheben einer Frontklappe an einem Fahrzeug
DE10033126B4 (de) * 1999-07-08 2011-03-17 Honda Giken Kogyo K.K. Fahrzeughaubenvorrichtung
DE59901999D1 (de) * 1999-09-28 2002-08-14 Ford Global Tech Inc Hubkolben-Zylinder Einheit einer Sicherheitseinrichtung zum Schutz von Fussgängern
DE10108882A1 (de) * 2001-02-23 2002-09-05 Volkswagen Ag Hubsystem
SE520224C2 (sv) * 2001-11-12 2003-06-10 Stroemsholmen Ab Förfarande och anordning vid en kolv-cylinderanordning innefattande en brott- eller stukanvisning
DE10249272A1 (de) * 2002-10-23 2004-05-13 Ise Innomotive Systems Europe Gmbh Vorrichtung zum Schutz von Personen bei einem Frontalaufprall auf ein Kraftfahrzeug
FR2848947B1 (fr) * 2002-12-20 2006-01-13 Pyroalliance Dispositif de securite pour soulever un capot d'un vehicule automobile en cas de collision
DE102004004987A1 (de) * 2003-05-10 2004-12-09 Suspa Holding Gmbh Fußgängerschutz-Hubvorrichtung sowie Kraftfahrzeug mit einer Fußgängerschutz-Hubvorrichtung
DE20320551U1 (de) * 2003-07-07 2004-10-14 Ise Innomotive Systems Europe Gmbh Vorrichtung zum Schutz von Personen bei einem fronthaubenseitigen Aufprall auf ein Kraftfahrzeug
DE10331018B4 (de) 2003-07-09 2006-04-27 Wincor Nixdorf International Gmbh Vorrichtung zum selektiven stapelförmigen Ablegen von Blättern
DE10341314A1 (de) * 2003-09-08 2005-03-31 Trw Occupant Restraint Systems Gmbh & Co. Kg Kolben-Zylinder-Antrieb mit Energiewandlungsvorrichtung, fahrzeugintegriertes Personensicherheitssystem sowie Verfahren zum Betreiben eines derartigen Systems
DE102004004988A1 (de) * 2004-01-30 2005-08-18 Suspa Holding Gmbh Hubvorrichtung,deren Verwendung sowie Kraftfahrzeug mit einer Fußgängerschutz-Vorrichtung
DE102004007687A1 (de) * 2004-02-16 2005-09-01 Trw Automotive Gmbh Haubenaufstellvorrichtung
JP4200440B2 (ja) * 2004-03-18 2008-12-24 株式会社デンソー 歩行者保護装置
DE102004056301A1 (de) * 2004-10-19 2006-04-20 Witte-Velbert Gmbh & Co. Kg Scharnieranordnung für eine Motorhaube mit Fußgängerschutz
DE102008011731A1 (de) 2008-02-28 2009-09-03 GM Global Technology Operations, Inc., Detroit Pneumatischer Aktuator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20013256U1 (de) * 2000-08-01 2001-12-13 TR ENGINEERING GmbH, 67433 Neustadt Betätigungsvorrichtung für ein bewegliches Element
DE10247801A1 (de) * 2002-10-14 2004-04-22 Innotec Forschungs- Und Entwicklungs-Gmbh Fussgängerschutz-Aktuator
WO2004108486A1 (fr) * 2003-06-06 2004-12-16 Acts - Advanced Car Technology Systems Gmbh & Co. Kg Dispositif et procede pour soulever le capot frontal d'une automobile en cas de collision avec un pieton
EP1745993A1 (fr) * 2005-07-23 2007-01-24 ISE Innomotive Systems Europe GmbH Dispositif de levage pour capot moteur d'un véhicule automobile

Also Published As

Publication number Publication date
DE502007003656D1 (de) 2010-06-17
US8196507B2 (en) 2012-06-12
EP1991449A1 (fr) 2008-11-19
CN101389511B (zh) 2011-08-17
US20090095151A1 (en) 2009-04-16
CN101389511A (zh) 2009-03-18
ATE466752T1 (de) 2010-05-15
DE102006008901A1 (de) 2007-08-30
RU2008138581A (ru) 2010-04-10
RU2414364C2 (ru) 2011-03-20
EP1991449B1 (fr) 2010-05-05

Similar Documents

Publication Publication Date Title
WO2007098906A1 (fr) Actionneur pour capot actif
EP1943128B1 (fr) Dispositif d'actionnement pyrotechnique dote d'un cylindre dans lequel des chambres communiquent
WO2006103041A2 (fr) Systeme de serrage rapide
WO2008025372A1 (fr) Actionneur pour un capot actif
EP2688774B1 (fr) Dispositif de fixation destiné à fixer de manière libérable un élément sur une pièce fixée à demeure sur un véhicule
CH625470A5 (fr)
WO2005085653A1 (fr) Unite de securite
DE10033126B4 (de) Fahrzeughaubenvorrichtung
DE102011119998A1 (de) Federspeicherbremszylinder mit Notlöseeinrichtung
EP1549534A2 (fr) Dispositif pour proteger des individus en cas de choc frontal dans une automobile
DE102009041418A1 (de) Fahrzeugscharnier zum Anheben einer Fahrzeughaube in einer Unfallsituation
DE4310285C1 (de) Durch Druck eines Fluids auslösbares Ventil für Brandunterdrückungsanlagen
DE3723120A1 (de) Automatisch gesteuertes servoventil mit schnelloeffnung
WO2007098901A1 (fr) Dispositif d'actionnement pour capot actif
DE10343077B4 (de) Fußgängerschutz-Aktuator mit pyrotechnischem Schubelement
DE4217969A1 (de) Gurtstraffer mit mehrstufigem Antrieb
DE9316464U1 (de) Spannvorrichtung zum Dehnen von Schrauben
EP1731272B1 (fr) Dispositif batteur pneumatique ainsi que procédé de fonctionnement d'un dispositif batteur pneumatique
DE102020118957A1 (de) Aktuator zur verstellung einer fronthaube von einer normallage in eine schutzlage
DE10159865A1 (de) Sicherheitseinrichtung zum Schutz von Fußgängern und Zweiradfahrern
DE102013213793A1 (de) Fußgängerschutzeinrichtung für ein Fahrzeug
DE102005028967B4 (de) Betätigungsvorrichtung und Verfahren zum Betreiben einer Betätigungsvorrichtung
DE102004007687A1 (de) Haubenaufstellvorrichtung
DE2637200C2 (de) Einrichtung zur Schnellentleerung eines Flugzeug-Kraftstofftanks
DE10258784A1 (de) Fussgängerschutz-Aktuator-Rückstellung

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
WWE Wipo information: entry into national phase

Ref document number: 2007711661

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 200780006882.0

Country of ref document: CN

ENP Entry into the national phase

Ref document number: 2008138581

Country of ref document: RU

Kind code of ref document: A

WWE Wipo information: entry into national phase

Ref document number: 12280785

Country of ref document: US